Starting in 2016, the residents of four states/territories will face a new set of rules regarding valid ID for domestic flights. Essentially, the standard driver's licenses issued by New York, New Hampshire, Minnesota, and American Samoa have been found to be noncompliant according the guidelines put forth in the Real ID Act; starting at some point (TBD) in 2016, these licenses will no longer be considered as valid identification for boarding domestic flights.

Are you a resident of New York, New Hampshire, Minnesota, or American Samoa? In preparation for this change to take effect, you should apply for a passport (or renew it if yours is out-of-date) and plan to use that for all flights, even within the U.S., starting in 2016.